Celtics forward Darius Miles doesn't believe that his right knee will ever be one-hundred percent again.

Miles was diagnosed with a career-ending knee injury while with Portland, but is attempting to make a comeback with Boston.

"I am ready to go, but I just need to get in better shape. It's about maintaining the strength in my legs and getting my timing," Miles said. "I'm excited and anxious and ready to go and play. I don't think my leg will ever be 100 percent again, but I feel like I'm 90-95 percent."

However, Tim Grover, a fitness specialist, thinks that Miles could be back to one-hundred percent by the end of December.

"From an explosiveness and quickness standpoint, he is 80-85 percent from where he used to be, and my guess is he should be back to 100 percent by Christmas," Grover said.